TDA4445A Datasheet, PDF (3/8 Pages) STMicroelectronics – SOUND IF AMPLIFIER

TELEFUNKEN Semiconductors
TDA4445A/TDA4445B
Electrical Characteristics
V_S = 12 V, T_amb = + 25°C, reference point pin 13, unless otherwise specified
Parameters
Test Conditions / Pins Symbol Min.
Typ.
Max.
Unit
Supply current
V_1–16 = 10 mV
I_S
or V₃= 3.5 V Pin 11
60
mA
DC output voltage
V _1–16 = 10 mV,
V_O
5.0
V
unmodulated Pin 12
DC output current
V₁₁ = 7.5 V,
V₃ = 3.5 V
Pin 12
I_max
1.8
V
Input impedance
Pin 1–16
R
1.6
kW
Pin 1–16
C
2.0
PF
Switch off control voltage VTR mode
Switch off control current VTR mode
Pin 3
Pin 3
V
8
I
50
10
V
150
mA
Quasi Parallel Sound Operation
f_PC = 38.9 MHz, f_SC1 = 33.4 MHz, f_SC2 = 33.16 MHz, PC/SC = 13 dB, PC/SC2 = 20 dB,
PC unmodulated (equivalent to sync. peak current)
Parameters
Test Conditions / Pins Symbol Min.
Typ.
Max. Unit
Minimum input voltage
5.5 MHz output signal
–3dB
Pin 1–16
v_i
50
mV
Maximum input voltage
5.5 MHz output signal
+1 dB
Pin 1–16
v_i
80
mV
IF AGC range
AGC capacitor
∆G_IF
64
control time constant, Pin 3
C₃
0.33
dB
10
mF
Sound-IF-output voltage V_1–16= 10 mV, SC unmodulated
5.5 MHz output voltage
Pin 12
v_i
250
mV
5.74 MHz output voltage
110
Signal to noise ratio: measured according to CCIR 468–2
reference signal: v_1–16 = 10 mV, FM-frequency deviation = +30 kHz
f_mod = 1 kHz, measured at audio-output sound IF demodulator U2829B
1. Channel/ 2. Channel
Black screen
Standard B/G modulated IF signal Grid pattern
Pin 12
S+NN
62/58
52/49
dB
(residual carrier 10%)
Bistandard Operation
Parameters
IF AGC range
AGC capacitor
(control time constant)
Test Conditions / Pins Symbol Min.
Typ.
Max.
Unit
∆G_IF
64
dB
Pin 3
Pin 5
CC₃₅
10
4.7
mF
Rev. A1: 14.09.1995
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